The most common and most likely answer to this crossword clue is the 6 letter word DIMWIT
I've seen this crossword clue in The Guardian
D
I
M
W
I
T
More clues leading to the result DIMWIT
- Idiot! Lad I’m with is not all there
- Obtuse humour of a stupid person
- In bed I’m withdrawn, what a fool
- Nit wife’s found in white cotton not unknown
- Turkey I had raised with German around start of week
- Some bod I’m with is not the brightest
- Will this fool's jokes be not so bright?
- Fool’s errand, finally I’m stuck with detail
- Stupid wife seen in white cotton endlessly
Buddy explains!

The straight part
We know that "Idiot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case idiot = dimwit.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DIMWIT mean?
DIMWIT noun- A person who is deficient in intelligence.